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5SIM Alternative: When You Need US Numbers That Pass

5SIM is one of the cheapest verification services around. Its headline price starts at $0.008 a number, and it says it has "over 500,000 numbers originating from around 180 countries". If no SMS arrives, it refunds automatically. For a lot of uses, that is hard to beat.

The reason people search for a 5SIM alternative is almost always the same: the cheap number did not work on the platform they needed. This page explains why that happens and when it is worth paying more.

Written by SMS Portal. 5SIM facts come from its homepage and API docs, checked in September 2026.

Why a cheap number sometimes fails

5SIM describes its stock as "virtual numbers". As far as we could find, it does not claim that its numbers are non-VoIP or carrier-issued. That is not a criticism: for many services and countries, a virtual number is all you need.

Strict platforms are different. WhatsApp, Google, many banks, marketplaces and some social networks run a carrier lookup on the number before sending a code, and refuse anything that looks like VoIP. When that happens:

  • you get "this number cannot be used for verification", or
  • the site says it sent a code and nothing arrives.

A refund gets your money back, but not your time. After three failed numbers, the "cheap" option has cost you half an hour. How websites detect VoIP numbers explains the lookup.

When 5SIM is the right tool

  • You need a country other than the US. We sell US numbers only.
  • The platform is lenient. Plenty of services accept any number that receives SMS. Pay the least you can.
  • You are cost-sensitive at volume and can tolerate retries.

When a US carrier number is worth more

  • The platform is strict, and you have already burned numbers on it.
  • You need a US number specifically, such as for a US bank, marketplace or app store region.
  • You will need the account again, so you want a rental you can renew, rather than a one-time number.
  • You want to choose the carrier or area code. AT&T or T-Mobile, plus area codes with live stock, on Temp (s2).

Every number we sell is a US mobile carrier line. Prices are per service and public on the pricing page. If no code arrives, cancel for a full refund, and unused numbers are refunded automatically at expiry.

Compare on your service, not the headline

5SIM's $0.008 floor applies to low-demand service and country pairs. A US number for a popular platform costs more on every provider. The only fair comparison is:

  1. Pick the exact service you need.
  2. Look up a US number for that service on both sites.
  3. Factor in how many attempts each is likely to take on that platform.
  4. Test one order before depositing more.

For API users

5SIM uses its own REST API with bearer tokens (buy, check, finish, cancel, ban). Ours is also REST with bearer tokens: order with POST /api/v2/tn101/request-number, poll get-number-details until pin is set, and cancel with reject-number. We also send HMAC-signed webhooks, so you do not have to poll. See the API page.

FAQ

Is 5SIM cheaper than SMS Portal?

On headline price, yes, by a wide margin. On a US number for a strict platform, the gap is much smaller, and a number that fails costs you retries. Compare the service you actually need.

Are 5SIM numbers VoIP?

5SIM calls them "virtual numbers" and, as far as we could find, makes no non-VoIP claim. Whether a given platform accepts them varies. A carrier lookup on the number will tell you its line type.

Does SMS Portal offer other countries like 5SIM?

No. US numbers only.

Do both refund when no SMS arrives?

Yes. 5SIM refunds automatically. We refund in full when you cancel before a code arrives, and automatically when the number expires unused.

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